Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
Star Walk is the most beautiful stargazing app you’ve ever seen on a mobile device
Free · In-app purchases
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Star Walk:Find Stars & Planets: map the core Education workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inconsistent performance on older devices
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: High subscription cost for premium features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Complex navigation structure
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Star Walk is the most beautiful stargazing app you’ve ever seen on a mobile device. It will become your interactive guide to the night sky, following your every movement in real-time and allowing you to explore over 200, 000 celestial bodies with extensive information. ***Over 10 million users! Winner of Apple Design Award 2010*** “Star Walk is a remarkably in-depth and detailed astronomy app. There's so much you can do with this app” - Common sense media “Star Walk is the best stargazing application I have come across for the iPhone. Many of the features found within the application cannot be found in any others! This is one of the best developed and executed applications I have seen to hit the app store.” - iMore “This app brings the old paper star chart into the smartphone age, and makes exploring the night sky easily accessible to everyone.” - Soggy Astronomer Duran Duran's keyboard Nick Rhodes mentions Star Walk as his favourite app: “It’s brilliant, and if you’re ever somewhere with a clear sky and no light pollution, it’s a revelation. It’s beautifully designed and makes clever use of the available technology. I’m fascinated by astronomy, but even if you’re not, give this a go.” Key features: • Night sky map with thousands of stars, constellations and other sky objects. • Real-time tracking of celestial bodies. • Augmented reality sky view. • Deep sky objects to explore in detail. • Night mode. • Extensive information about all sky objects. • The ability to travel in time with “Time machine” • Astronomical calendar with various celestial events. • Stunning space pictures in “Picture of the Day”. • “Sky Live” section with info about the moon phases, the amount of daylight, the visibility of the planets, etc. Astronomical calendar, deep space objects, meteor showers, dwarf planets, asteroids, comets, and satellites are available through the STAR WALK PLUS subscription. ‣ Launch the app and point your device at the night sky - you'll see the stars, planets, satellites, and constellations in their proper place from your location. As you move your device, the star map updates in real time.* ‣ Every object you tap has an (i) next to its name, tap it to access some information. ‣ A scale on right is the “Time machine”, slide it to explore the map of the night sky of tomorrow or years ago. ‣ A calendar of celestial events will make sure you never miss anything interesting. ‣ Tap Augmented Reality icon in the upper right corner to add the image from your camera to your sky view. ‣ Use Night Mode to go easy on your eyes and preserve night vision when exploring the Universe. ‣ Star Walk is your personal planetarium. Project to a big screen with no picture quality loss. *This feature (Star Spotter) is available for devices with digital compass. If your device does not have the digital compass, you can use your fingers to change the view of the sky map. Links: http://www.facebook.com/StarWalkApp http://twitter.com/starwalk STAR WALK PLUS removes ads from the app and gives you access to the calendar with astronomical events, deep space objects, meteor showers, dwarf planets, asteroids, comets, and satellites. It offers a one-week free trial followed by an auto-renewing subscription. Payment will be charged to iTunes Account at confirmation of purchase, and your account will be charged for renewal within 24-hours prior to the end of the current period. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Subscription may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Terms of use: http://vitotechnology.com/terms-of-use.html Start your best stargazing experience right now!
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.